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Recent research in the human computer interaction and information retrieval areas has revealed that search response latency exhibits a clear impact on the user behavior in web search. Such impact is reflected both in users’ subjective perception of the usability of a search engine and in their interaction with the search engine in terms of the number of search results they engage with. However, a similar impact analysis has been missing so far in the context of sponsored search. Since the predominant business model for commercial search engines is advertising via sponsored search results (i.e., search advertisements), understanding how response latency influences the user interaction with the advertisements displayed on the search engine result pages is crucial to increase the revenue of a commercial search engine. To this end, we conduct a large-scale analysis using query logs obtained from a commercial web search. We analyze the short-term and long-term impact of search response latency on the querying and clicking behaviors of users using desktop and mobile devices to access the search engine, as well as the corresponding impact on the revenue of the search engine. This analysis demonstrates the importance of serving sponsored search results with low latency and provides insight into the ad serving policy of commercial search engines to ensure long-term user engagement and search revenue. 相似文献
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《Information processing & management》2019,56(5):1667-1679
In this paper, we explore the effects of individual pressure level and time constraint on searchers' behaviors and their assessment of search experience within the framework of interactive information retrieval. A user experiment was conducted in which 40 participants individually searched for information in a laboratory setting under two conditions: with time constraint (TC) and with no time constraint (NTC). Participants filled in a Perceived Stress Scale questionnaire to measure their chronic pressure value (subjective stress), and their pressure value was recorded as their individual characteristic. The results showed that the more chronic pressure the searcher has, the more search efforts they devote, including more time in searching and more time to complete the search tasks, especially when there was no time constraint. Time constraint and searchers’ pressure value had a significant effect on users’ numbers of scrolling actions per minute. The results indicate that when given a time constraint, searchers with higher-pressure values tend to lower their reading or scanning speed, while searchers with lower-pressure values tend to accelerate their reading or scanning speed. The results suggested different people would react to the time condition change in different ways, especially people with higher pressure. Therefore, it is necessary to examine users’ search behaviors in person-in-situation frameworks to analyze the effects of contextual factors on users. This study contributes to our knowledge of how contextual factors and individual characteristics affect searchers’ behaviors and have implications for the design of IIR systems. 相似文献
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搜索引擎是互联网资源搜索的入口,搜索的快捷性、准确性是搜索引擎的核心竞争力,如何提高竞争力是业内企业的工作重点。已有的搜索引擎算法中,最具代表性的就是PageRank算法,针对该算法的改进方法也有很多,但效果并不很理想。分析了已有PageRank改进方法的不足,立足于用户搜索行为信息挖掘,采用时序关联分析方法,将关联比例作为权值加入到PageRank计算公式中,改变平均分配权威值的计算方法,从而得到了改进的PageRank算法——TCPR算法,使得搜索排序结果更符合用户的信息需求。 相似文献
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【目的/意义】社会支持是虚拟健康社区用户知识分享的重要驱动因素,有必要系统阐释社会支持激发用户
健康知识分享的内在机制和边界条件。【方法/过程】基于社会支持和认知-情感系统理论,构建了社会支持通过信
任和社区归属感影响用户健康知识分享的链式中介模型,并探讨了感知自我效能的边界作用,以收集的286份有效
数据为样本进行了实证分析。【结果/结论】研究发现,社会支持（信息支持、情感支持）对用户健康知识分享具有积
极的正向影响;信任和社区归属感在社会支持（信息支持、情感支持）对用户健康知识分享的影响过程中具有链式
中介作用,用户的感知自我效能对此路径具有强化作用,用户的感知自我效能越高,其社区归属感对健康知识分享
的影响越明显,信息支持和情感支持对健康知识分享的影响路径也越强。【创新/局限】本文运用认知-情感系统理
论解释了社会支持对用户健康知识分享的影响机制,丰富了用户健康信息行为领域的研究成果。 相似文献
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[目的/意义]本文以用户行为感知视角，研究影响移动社交网络主导型用户与浏览型用户持续使用的因素，为移动社交网络信息服务提供理论基础，并为移动社交网络提供商提出参考与应用借鉴。[方法/过程]分析移动社交网络主导型用户与浏览型用户持续使用意愿影响因素，引入相关变量，构建了基于用户行为感知的移动社交网络信息服务持续使用意愿模型并提出假设，最后通过结构方程模型进行实证分析。[结果/结论]感知有用性、感知易用性、感知娱乐、感知质量等因素均显著影响主导型及浏览型两类用户；服务质量、感知风险、知识获取、个人创新、社会认可、感知信任、感知转换成本等因素对两类用户有不同程度的影响。 相似文献
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《International Journal of Information Management》2017,37(5):367-379
The primary aim of this study is to examine the factors that predict end users’ intention to adopt mobile government (m-government) services in a developing country. The research is based upon a self-administered questionnaire survey of 120 current users’ in the United Arab Emirates (UAE), a leader in m-government development in the Arab world. The study employs advanced statistical techniques to test an extended the Technology Acceptance Model (TAM) by incorporating the determinants of trust, cost, social influence, variety of services, perceived usefulness in information technology and demographic profiles. The findings revealed that trust and social influence are positively associated with end users intention to adopt m-government services in the UAE. By identifying the predictors of users’ adoption of m-government, this study provides several theoretical and practical implications related to m-government service adoption. 相似文献
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在前人相关研究的基础上,提出了一个搜索引擎网站用户忠诚度影响因素的研究模型,分析了搜索引擎网站用户忠诚度影响因素主要包括可用性、知名度、信任、满意度和信息检索模型评价等,此外,用户对搜索引擎的熟悉度对用户的信息获取行为也起到了重要的作用。 相似文献
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《Information processing & management》2020,57(2):102184
Recreational queries from users searching for places to go and things to do or see are very common in web and mobile search. Users specify constraints for what they are looking for, like suitability for kids, romantic ambiance or budget. Queries like “restaurants in New York City” are currently served by static local results or the thumbnail carousel. More complex queries like “things to do in San Francisco with kids” or “romantic places to eat in Seattle” require the user to click on every element of the search engine result page to read articles from Yelp, TripAdvisor, or WikiTravel to satisfy their needs. Location data, which is an essential part of web search, is even more prevalent with location-based social networks and offers new opportunities for many ways of satisfying information seeking scenarios.In this paper, we address the problem of recreational queries in information retrieval and propose a solution that combines search query logs with LBSNs data to match user needs and possible options. At the core of our solution is a framework that combines social, geographical, and temporal information for a relevance model centered around the use of semantic annotations on Points of Interest with the goal of addressing these recreational queries. A central part of the framework is a taxonomy derived from behavioral data that drives the modeling and user experience. We also describe in detail the complexity of assessing and evaluating Point of Interest data, a topic that is usually not covered in related work, and propose task design alternatives that work well.We demonstrate the feasibility and scalability of our methods using a data set of 1B check-ins and a large sample of queries from the real-world. Finally, we describe the integration of our techniques in a commercial search engine. 相似文献
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移动广告接受意愿的影响因素研究——基于大学生移动广告体验的视角 总被引：1，自引：0，他引：1
以计划行为理论作为理论依据,将感知风险、感知控制、用户信任、广告奖励、社会影响作为变量,建立了一个移动广告接受意愿模型,旨在分析影响用户接受移动广告的关键因素。实证结果发现:感知控制、广告奖励、社会影响对用户意愿有着显著性的正向影响,而用户信任和感知风险对用户意愿的影响并不显著。 相似文献
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《Information processing & management》2020,57(2):102069
Information need is one of the most fundamental aspects of information seeking, which traditionally conceptualizes as the initiation phase of an individual’s information seeking behavior. However, the very elusive and inexpressible nature of information need makes it hard to elicit from the information seeker or to extract through an automated process. One approach to understanding how a person realizes and expresses information need is to observe their seeking behaviors, to engage processes with information retrieval systems, and to focus on situated performative actions. Using Dervin’s Sense-Making theory and conceptualization of information need based on existing studies, the work reported here tries to understand and explore the concept of information need from a fresh methodological perspective by examining users’ perceived barriers and desired helps in different stages of information search episodes through the analyses of various implicit and explicit user search behaviors. In a controlled lab study, each participant performed three simulated online information search tasks. Participants’ implicit behaviors were collected through search logs, and explicit feedback was elicited through pre-task and post-task questionnaires. A total of 208 query segments were logged, along with users’ annotations on perceived problems and help. Data collected from the study was analyzed by applying both quantitative and qualitative methods. The findings identified several behaviors – such as the number of bookmarks, query length, number of the unique queries, time spent on search results observed in the previous segment, the current segment, and throughout the session – strongly associated with participants’ perceived barriers and help needed. The findings also showed that it is possible to build accurate predictive models to infer perceived problems of articulation of queries, useless and irrelevant information, and unavailability of information from users’ previous segment, current segment, and whole session behaviors. The findings also demonstrated that by combining perceived problem(s) and search behavioral features, it was possible to infer users’ needed help(s) in search with a certain level of accuracy (78%). 相似文献
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The purpose of this research is to consider how trust in and perceived risk of a mobile marketplace impact a consumer before installing a mobile application. In particular, trust is considered from the perspective of institutionalized trust, where consumers faced with ignorance rely on institutionalized mechanisms for personal safety. A bidirectional research model is presented based on trust and perceived risk as antecedents to the intent to install a mobile application. Data is collected from a survey of 214 participants and is analyzed using structural equation modeling. Results suggest that institutional loyalty plays a significant role in consumers’ intent to install mobile apps. Trust and its antecedent, security, had strong significant positive relationships with the intention to install mobile apps, while risk and its antecedent, privacy, had weak and insignificant relationships. The bidirectional model’s relationship between trust and risk was also insignificant in both directions, further suggesting that perception of risk is an insignificant factor in the intent to install mobile apps. 相似文献
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【目的/意义】针对现有用户在线健康信息搜寻行为的实证研究中存在的结果不一致现象,对该领域相关
研究进行梳理验证,旨在明确影响用户在线健康信息搜寻行为的真正因素以及关键调节变量,揭示用户在线健康
信息搜寻行为产生的直接原因,为完善用户在线健康信息搜寻行为理论体系及相关领域的后续研究提供借鉴。【方
法/过程】选取 25篇符合标准的中外文献进行元分析,探究影响因素及其影响程度,从国内外研究情境、用户的社
会属性与健康状况三个维度探讨影响因素与在线健康信息搜寻行为间的调节效应。【结果/结论】结果表明,10个因
素对用户在线健康信息搜寻行为有显著正向影响,其中信息质量的影响强度最高,感知风险、信任、自我效能及感
知有用性对在线健康信息搜寻行为的影响强度较弱,同时验证了国内外研究情境、用户的社会属性与健康状况对
在线健康信息搜寻行为具有调节作用。【创新/局限】本文采用元分析方法,通过对前人研究结果的再分析,得到更
加精准的研究结论,是对在线健康信息搜寻领域现有研究的有力补充。但对元分析方法的应用还较为单一,未涉
及各影响因素间的关系,有待后续进一步研究。 相似文献
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《Information processing & management》2001,37(4):593-601
There are several recent studies that propose search output clustering as an alternative representation method to ranked output. Users are provided with cluster representations instead of lists of titles and invited to make decisions on groups of documents. This paper discusses the difficulties involved in representing clusters for users’ evaluation in a concise but easily interpretable form. The discussion is based on findings and user feedback from a user study investigating the effectiveness of search output clustering. The overall impression created by the experiment results and users’ feedback is that clusters cannot be relied on to consistently produce meaningful document groups that can easily be recognised by the users. They also seem to lead to unrealistic user expectations. 相似文献
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Petros Kostagiolas Nikolaos Korfiatis Panos Kourouthanasis Georgios Alexias 《International Journal of Information Management》2014
Regulation of clinical practice is a characteristic aspect of the medical profession. Regardless of whether this regulation derives from government-sourced guidelines or materials from government-sponsored institutions, it results in a high production of information resources (institutional information resources), which are disseminated to the clinical stuff in order to ensure compliance. In that case, the issue of credibility of these information resources might arise, since medical practice is characterized by a high frequency of change. The latter involves a continuous effort on the part of the clinical staff, which is motivated by work-related factors (e.g., need for compliance) or personal motivation (e.g., need for self-improvement). In this study we consider a simple trust model, according to which we assume that perceived trust is a direct antecedent of perceived credibility. We evaluate whether work-related or personal motivating factors influence the relation between perceived credibility and trust toward institutional information sources and how the effect of each factor affects this relation. Findings suggest that work-related factors have a higher impact on the relation between credibility and trust than personal motivation factors, while they are stressing the important role of hospital libraries as a dissemination point for government-sponsored information resources. 相似文献
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The Web and especially major Web search engines are essential tools in the quest to locate online information for many people. This paper reports results from research that examines characteristics and changes in Web searching from nine studies of five Web search engines based in the US and Europe. We compare interactions occurring between users and Web search engines from the perspectives of session length, query length, query complexity, and content viewed among the Web search engines. The results of our research shows (1) users are viewing fewer result pages, (2) searchers on US-based Web search engines use more query operators than searchers on European-based search engines, (3) there are statistically significant differences in the use of Boolean operators and result pages viewed, and (4) one cannot necessary apply results from studies of one particular Web search engine to another Web search engine. The wide spread use of Web search engines, employment of simple queries, and decreased viewing of result pages may have resulted from algorithmic enhancements by Web search engine companies. We discuss the implications of the findings for the development of Web search engines and design of online content. 相似文献
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Social content systems contain enormous collections of unstructured user-generated content, annotated by the collaborative effort of regular Internet users. Tag-clouds have become popular interfaces that allow users to query the database of these systems by clicking relevant terms. However, these single click queries are often not expressive enough to effectively retrieve the desired content. Users have to use multiple clicks or type longer queries to satisfy their information need. 相似文献
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门户网站就像是企业在虚拟世界构建的一个家。如何把客户从一个虚拟世界引向现实的企业。这样门户网站的可信度就摆到了网站建设的重要位置。该文从用户体验、搜索引擎优化、营销推广三方面进行阐述如何塑造门户网站的可信度。 相似文献
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《Information processing & management》2005,41(5):1243-1262
The analysis of contextual information in search engine query logs enhances the understanding of Web users’ search patterns. Obtaining contextual information on Web search engine logs is a difficult task, since users submit few number of queries, and search multiple topics. Identification of topic changes within a search session is an important branch of search engine user behavior analysis. The purpose of this study is to investigate the properties of a specific topic identification methodology in detail, and to test its validity. The topic identification algorithm’s performance becomes doubtful in various cases. These cases are explored and the reasons underlying the inconsistent performance of automatic topic identification are investigated with statistical analysis and experimental design techniques. 相似文献